Brierley estimates the total membership of non-Trinitarian churches (including the Christadelphians, Christian Scientists, Mormons and Jehovah's Witnesses) as having risen from 71,000 in 1900 to 537,000 in 2000.

Convincing the government the humanist cause was worthy of a seat up there among the tax-free clouds alongside the Catholics and the Christadelphians, however, wasn't easy.

Some groups, like the Christadelphians, confined themselves to a specific objection to bearing arms, and agreed to accept non-combatant service.